Add a config for neelix.

nix/configuration/configuration.nix

@@ -11,7 +11,6 @@
     ./roles/reset
     ./util/unfree_polyfill
     ./roles/iso
-    ./hosts/odo
     "${
       builtins.fetchTarball {
         url = "https://github.com/nix-community/disko/archive/refs/tags/v1.9.0.tar.gz";

nix/configuration/flake.nix

@@ -81,7 +81,39 @@
       };
       systems = {
         odo = {
-          main = nixpkgs.lib.nixosSystem (base_x86_64_linux // { });
+          main = nixpkgs.lib.nixosSystem (
+            base_x86_64_linux
+            // {
+              modules = base_x86_64_linux.modules ++ [
+                ./hosts/odo
+              ];
+            }
+          );
+          iso = nixpkgs.lib.nixosSystem (
+            base_x86_64_linux
+            // {
+              modules = base_x86_64_linux.modules ++ [
+                (nixpkgs + "/nixos/modules/installer/cd-dvd/iso-image.nix")
+                # TODO: Figure out how to do image based appliances
+                # (nixpkgs + "/nixos/modules/profiles/image-based-appliance.nix")
+                {
+                  isoImage.makeEfiBootable = true;
+                  isoImage.makeUsbBootable = true;
+                  me.buildingIso = true;
+                }
+              ];
+            }
+          );
+        };
+        neelix = {
+          main = nixpkgs.lib.nixosSystem (
+            base_x86_64_linux
+            // {
+              modules = base_x86_64_linux.modules ++ [
+                ./hosts/neelix
+              ];
+            }
+          );
           iso = nixpkgs.lib.nixosSystem (
             base_x86_64_linux
             // {
@@ -103,5 +135,7 @@
     {
       nixosConfigurations.odo = systems.odo.main;
       iso.odo = systems.odo.iso.config.system.build.isoImage;
+      nixosConfigurations.neelix = systems.neelix.main;
+      iso.neelix = systems.neelix.iso.config.system.build.isoImage;
     };
 }

nix/configuration/hosts/neelix/default.nix

@@ -0,0 +1,30 @@
+{ config, pkgs, ... }:
+{
+  imports = [
+    ./hardware-configuration.nix
+    ./disk-config.nix
+    ./optimized_build.nix
+    ./power_management.nix
+    ./screen_brightness.nix
+    ./wifi.nix
+  ];
+
+  # Generate with `head -c4 /dev/urandom | od -A none -t x4`
+  networking.hostId = "fbd233d8";
+
+  networking.hostName = "neelix"; # Define your hostname.
+
+  time.timeZone = "America/New_York";
+  i18n.defaultLocale = "en_US.UTF-8";
+
+  me.secureBoot.enable = false;
+
+  # Early KMS
+  boot.initrd.kernelModules = [ "i915" ];
+
+  # Mount tmpfs at /tmp
+  boot.tmp.useTmpfs = true;
+
+  me.graphical = true;
+  me.graphicsCardType = "intel";
+}

nix/configuration/hosts/neelix/disk-config.nix

@@ -0,0 +1,140 @@
+# Manual Step:
+#   Check if drive supports 4kn: nvme id-ns -H /dev/nvme0n1
+#   Format the drive to 4kn: nvme format --lbaf=1 /dev/nvme0n1
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+lib.mkIf (!config.me.buildingIso) {
+  disko.devices = {
+    disk = {
+      main = {
+        type = "disk";
+        device = "/dev/nvme0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "1G";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [
+                  "umask=0077"
+                  "noatime"
+                  "discard"
+                ];
+              };
+            };
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zroot";
+              };
+            };
+          };
+        };
+      };
+    };
+    zpool = {
+      zroot = {
+        type = "zpool";
+        # mode = "mirror";
+        # Workaround: cannot import 'zroot': I/O error in disko tests
+        options.cachefile = "none";
+        options = {
+          ashift = "12";
+          compatibility = "openzfs-2.2-freebsd";
+          autotrim = "on";
+        };
+        rootFsOptions = {
+          acltype = "posixacl";
+          atime = "off";
+          relatime = "off";
+          xattr = "sa";
+          mountpoint = "none";
+          compression = "lz4";
+          canmount = "off";
+          utf8only = "on";
+          dnodesize = "auto";
+          normalization = "formD";
+        };
+
+        datasets = {
+          "linux/nix" = {
+            type = "zfs_fs";
+            options.mountpoint = "none";
+          };
+          "linux/nix/root" = {
+            type = "zfs_fs";
+            options.mountpoint = "legacy";
+            mountpoint = "/";
+            postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot/linux/nix/root@blank$' || zfs snapshot zroot/linux/nix/root@blank";
+          };
+          "linux/nix/nix" = {
+            type = "zfs_fs";
+            options.mountpoint = "legacy";
+            mountpoint = "/nix";
+            postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot/linux/nix/nix@blank$' || zfs snapshot zroot/linux/nix/nix@blank";
+            options = {
+              recordsize = "1MiB";
+              compression = "lz4";
+            };
+          };
+          "linux/nix/home" = {
+            type = "zfs_fs";
+            options.mountpoint = "legacy";
+            mountpoint = "/home";
+            postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot/linux/nix/home@blank$' || zfs snapshot zroot/linux/nix/home@blank";
+          };
+          "linux/nix/persist" = {
+            type = "zfs_fs";
+            options.mountpoint = "legacy";
+            mountpoint = "/persist";
+            postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot/linux/nix/persist@blank$' || zfs snapshot zroot/linux/nix/persist@blank";
+          };
+          "linux/nix/state" = {
+            type = "zfs_fs";
+            options.mountpoint = "legacy";
+            mountpoint = "/state";
+            postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot/linux/nix/state@blank$' || zfs snapshot zroot/linux/nix/state@blank";
+          };
+        };
+      };
+    };
+  };
+
+  # Make sure all persistent volumes are marked as neededForBoot
+  #
+  # Also mounts /home so it is mounted before the user home directories are created.
+  fileSystems."/persist".neededForBoot = true;
+  fileSystems."/state".neededForBoot = true;
+  fileSystems."/home".neededForBoot = true;
+
+  fileSystems."/".options = [
+    "noatime"
+    "norelatime"
+  ];
+  fileSystems."/nix".options = [
+    "noatime"
+    "norelatime"
+  ];
+  fileSystems."/persist".options = [
+    "noatime"
+    "norelatime"
+  ];
+  fileSystems."/state".options = [
+    "noatime"
+    "norelatime"
+  ];
+  fileSystems."/home".options = [
+    "noatime"
+    "norelatime"
+  ];
+}

nix/configuration/hosts/neelix/hardware-configuration.nix

@@ -0,0 +1,32 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{
+  config,
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "nvme" "usbhid" "usb_storage" "sd_mod" "sdhci_pci" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.eno1.useDHCP = lib.mkDefault true;
+  # networking.interfaces.wlp58s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

nix/configuration/hosts/neelix/optimized_build.nix

@@ -0,0 +1,68 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  imports = [ ];
+
+  nix.settings.system-features = lib.mkForce [
+    "gccarch-alderlake"
+    "gccarch-x86-64-v3"
+    "benchmark"
+    "big-parallel"
+    "kvm"
+    "nixos-test"
+  ];
+
+  # nixpkgs.hostPlatform = {
+  #   gcc.arch = "alderlake";
+  #   gcc.tune = "alderlake";
+  #   system = "x86_64-linux";
+  # };
+
+  nixpkgs.overlays = [
+    (
+      self: super:
+      let
+        optimizeWithFlags =
+          pkg: flags:
+          pkg.overrideAttrs (old: {
+            NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
+          });
+        addConfig =
+          additionalConfig: pkg:
+          pkg.override (oldconfig: {
+            structuredExtraConfig = pkg.structuredExtraConfig // additionalConfig;
+          });
+      in
+      {
+        linux_alderlake =
+          addConfig
+            {
+              # Full preemption
+              PREEMPT = lib.mkOverride 60 lib.kernel.yes;
+              PREEMPT_VOLUNTARY = lib.mkOverride 60 lib.kernel.no;
+
+              # Google's BBRv3 TCP congestion Control
+              TCP_CONG_BBR = lib.kernel.yes;
+              DEFAULT_BBR = lib.kernel.yes;
+
+              # Preemptive Full Tickless Kernel at 300Hz
+              HZ = lib.kernel.freeform "300";
+              HZ_300 = lib.kernel.yes;
+              HZ_1000 = lib.kernel.no;
+            }
+            (
+              optimizeWithFlags super.linux_6_12 [
+                "-march=alderlake"
+                "-mtune=alderlake"
+              ]
+            );
+      }
+    )
+  ];
+
+  boot.kernelPackages = lib.mkIf (!config.me.buildingIso) (pkgs.linuxPackagesFor pkgs.linux_alderlake);
+}

nix/configuration/hosts/neelix/power_management.nix

@@ -0,0 +1,46 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  environment.systemPackages = with pkgs; [
+    powertop
+  ];
+
+  # pcie_aspm=force pcie_aspm.policy=powersupersave :: Enable PCIe active state power management for power reduction.
+  # nowatchdog :: Disable watchdog for power savings (related to disable_sp5100_watchdog above).
+  boot.kernelParams = [
+    "pcie_aspm=force"
+    # "pcie_aspm.policy=powersupersave"
+    "nowatchdog"
+  ];
+
+  # systemd.tmpfiles.rules = [
+  #   "w- /sys/firmware/acpi/platform_profile - - - - low-power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy1/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy2/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy3/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy4/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy5/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy6/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy7/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy8/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy9/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy10/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy11/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy12/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy13/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy14/energy_performance_preference - - - - power"
+  #   "w- /sys/devices/system/cpu/cpufreq/policy15/energy_performance_preference - - - - power"
+  # ];
+
+  boot.extraModprobeConfig = ''
+    options snd_hda_intel power_save=1
+  '';
+}

nix/configuration/hosts/neelix/screen_brightness.nix

@@ -0,0 +1,14 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  # systemd.tmpfiles.rules = [
+  #   "w- /sys/class/backlight/amdgpu_bl1/brightness - - - - 85"
+  # ];
+}

nix/configuration/hosts/neelix/wifi.nix

@@ -0,0 +1,16 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  # config = {
+  #   environment.loginShellInit = lib.mkIf (!config.me.buildingIso) ''
+  #     doas iw dev wlan0 set power_save off
+  #   '';
+  # };
+}

nix/configuration/hosts/odo/disk-config.nix

@@ -1,3 +1,6 @@
+# Manual Step:
+#   Check if drive supports 4kn: nvme id-ns -H /dev/nvme0n1
+#   Format the drive to 4kn: nvme format --lbaf=1 /dev/nvme0n1
 {
   config,
   lib,